Assuming 4S and 7XL, I would say 13/36 or 13/38. I'm running a 3S and 7XL with the 2 speed and it gets a little to warm with 16/36 (not 100% on the spur). Why no slipper though?
Its getting late here in Sweden , I was trying to say no clutch, since this was about the Tekno kit.
Thanks for the gearing suggestion, and yes 4S is what I use with tranny locked in second.